Concrete building-slab



M. B. HERBRICK.

CONCRETE BUILDING SLAB.

APPLICATION FILED SEPT. 22, 1920.

1,394,550. Patented Oct. 25, 1921.

2 SHEETS-SHEH I.

M. B. HEHBRICK.

CONCRETE BULLDING SLAB.

APPLICATION FILED SEPT. 22, 1920. 1,394,550,. Patented Oct. 25, 1921.

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r V we MILTON BJHERBRICK, OF OMAHA, NEBRASKA. I

' CONCRETE BUILDING-SLAB.

To all cabana, it-mfdyfconcerh:

Be it known that I, MILTON B. HERBRIOK, a citizen of the UnitedjStates, residing at 0111311515 in thel'county of Douglas and State .of'Nebraslra, have'invented certain new and luseful Improvements in Concrete Building-Slabs of whichthefollowing is a's'pecification. The present;

invehtion relates to building COIIStIHCiD'lOIi, and more particularly to reinforced concrete construction and slabs for and to provideslabs which may be manufacftured at apoint .distant from the site of the use inthe erection'aofbuildings .Anobjefct of the present invention is to minimize-the cost offibuilding construction;

to save time and labor in: such. construction;

. l'bnildingia'nd which be quickly and easily assembled. V I

Another object of the invention is to provide novel reinforcements for slabs. which I embody. supporting features forj oists and fthev like, and which provide interlocks be- .tweentheslabswhen assembled for holding A- further object j or the ave-lean" is to j e sa e ii e ih i 'ient an .fa'cili'tating the o g. of 11 Slabs to each other and. t afoundation or support,

provide ,a' novel ,form of reinforcing beam provided withseats or 'pocket's adapted to e eive the ends of joists for-supporting the .Ls'a'me and maintaining them in iipright and properly spaced apar't v relation.

ThBiiflbOVQiHld various other objects and. advant'ages ofthis" invention will be in part \des'cr'ibe'd imam-in fp'artlunde'rsftood from,

I Specification of Letters Patent. Patented Oct- Application ifiiea September 22, 1920iv serial no; 412,037.

F g. 7 a top plan view of the same. 1 Fig. 8, 1s a -detailed perspective View of a vert cal edge reinforcement for the slab.

Referring to the drawings by numerals, and first to Fig. 1, l0 designates a foundation or support which may be of brick or the like'laid in theusual manner and providing an upper flat supporting surface. 1 V

The bu lding is, mainly composed of a plurality of concreteslabs which are ar ranged in superposed relation and prefer ably with their adjacent ends meeting in offset or stepped relation .to increase the stability of the walls. Each slab 11 may be fornied'upon a flat table or platform and comprises a body of cementitious material rein-forcedby spaced apartrods 12 which are-traversed by reinforcing wires 13 form-v ingtherewith a fabric. The latter, as shown in Fig. 1, may ,beengaged in any suitable manner with the rodsf12' to maintain the same in properly spaced relation and to thus insure the even distribution of, stresses and strainsthroughoutthe body of the slab.

Each slab 1lis adapted to be disposed vertically and to rest at its lower end upon,

a subjacent slab or on the support 10 and is reinforced at its upper edgeby a steel beam 14, shown in detail in higs. 2 and In cross-section each beam l41is substanfing flange l5-'the top edge adapted to fwtheiffol lowing ,{detailed fjde'scription of the j [.Ipresent preferred emb odimel h'the same beingsrwhereiii z in i e Figure, 1,. is fragmentary sectional view ing i'llufstratedffinjfthe accompanying draw- 40 'Qio'fa corner of abuildingconstructed accord- 1 ting to the present invention.

2; 'is ladetail enlarged transverse secft k nenft e11 2'2Jf i 3t atop reinforcement of one ofthe slabsem- 1 -P yq I o Fig. 3;,ii aaaai a aga; plan view the' same;

ige i tiontaken on the line of Fig. 5, showing W .a bottom reinforcement for one of the. slabs.

; QEig. {5, is atop planview of the same.

overslie the outer face of the slab lljand provided with outwardly stamped lugs or projections16 forsupporting a facing 17 of a plastic or other suitable composition; The

tially C-shape and provided with a depenci beam 14 projects downwardly against the inner sideof the slab l1 tojanapprecia'ble extentand has at islowe'r edge an inturned flange 18 embedded in the slab and forming a rest as will appear. The inner side of the beami i'is provided with suitably spaced apzirtjrecsst's ,or'po'ckets 19 into which are adaptedto'be inserted the ends of girders or'beams 20 forsupporting flooring and the like, and the pockets l9 terminate at their bottoms in the fiange 18, the'latter forming admie niged transverse sec-' i e 'Figgfi, isa deta'il transverse section taken 55; i vmoclified formmf the bottomreinforcement.

on: the line 6 -6 of Fig. 7rshowing a slightly a ledge or support for the ends of the gird- ,ers 2O, T he beam 14 also has a plurality, of outstanding ears 21 adapted to lie against apertured, as at 22, to receivenails or the like for holding the ends of the girders in the pockets 19. j i

The bottom edges of the slabs are reinforced by beams 23, shown in detail in Figs,

the opposite sides of the girders 20 and are 4 and 5. Each beam 23 comprises a flat body portion adapted to lie against the lower edge of the slab and is provided along opposite edges with spaced apart upstanding projections 24 adapted to embrace the opposite sides of the slab 11 and having at such edges spaced apart depending projections 25 adapted .to embrace the opposite sides of a subjacent lab .11 for anchoring the slabs to each other and in true vertical port 10 are provided with a bottom reinforcing beam 28 such as is shown in Figs. 6

' and 7. This type of beam has the flat body portion adapted to lie flat upon the support 10 and has upstanding projections 29 for embracing the opposite faces of the slab 11 and is provided at its outer side with the outwardly struck spurs 30. The inner edge of the beam 28 has a horizontally projecting vThese beams are substantially W-shape in lug or ear 31 adapted to lie upon the upper face of the support and to extend inwardly from the slab and to receive, fastening devices 32 for securingthe lower slab to the support.

The ends of the slabs are reinforced by vertical end beams 33 shown in Fig. 8.

v cross-section and have lateral flanges 34 which are off-set from the edges of the body of the beam and the body is adapted to be positioned in the slab with the edges of the flanges. extending inwardly... and preferably ylying flush with the opposite sides of the slab.

- The slabs are erected with their adjacent ends in spaced apart relation, as shown in Fig. 1, and a cementitious filler 35 is adapted to be poured or otherwise suitably placed betweenthe adjacent end beams 33 for completing the wall and for anchoring theend beams 33 together.

-W'here openings, such as windows and 1 doors, are to be formed in the wall, the correspondingslabs 11 may be molded with frames 36 of channel iron or the like, in

the slabs, and defining'the proportions and 'sizes of such openings.

, Joists and ceiling beams may be conventionally placed in the building structure and in such cases the present invention contemplates the use of the reinforcing channel beams 37 at the tops of the slabs as shown in Fig. 1. The top slabs 11 maybe provided with upstanding bolts 38 anchored in the cementitious body of the slabs for securing plates 39 to the top of the wall for receiving the heels of rafters or the like in roof construction.

It is apparent from the above that the slabs 11 may be individually molded or formed at a factory and shipped to the building site. Also, that the slabs are re1nforced internally by the rods and wires 12 and 13 and are reinforced at their top, bottom and lateral edges to protect the same, not only during shipment and handling, but also against cracking, temperature changes and weights and stresses imposed on them incident to erection and use.

It will further be noted that the peculiar construction of the top reinforcing beams 14 is such that the girders 20 or the like may be properly held in upright position and also suitably supported upon the embedded flange or ledge 18. The general structure is such that the slabs may be standardized in size andform and may be used as units with which various sizes and types of buildings may be quickly and easily erected.

It is of course understood that various changes and modifications may be made in the details of construction, size, proportion and materials used, without departing from the spirit of this invention, such modifications and changes being restricted only by the scope of the following claims.

What is claimed is:

1. In building construction, a plurality of slabs adapted to be placed in edgewise suv perposed relation, each slab having top and bottom reinforcements embedded therein and with spaced apart recesses in the inner side of the top reinforcements for the re ception of the ends of girders, said bottom reinforcements having projections thereon adapted to interlock over the top reinforcements of subjacent slabs when the latter are assembled, said slabs also having edge reinforcements adapted to support and protect the lateral edges of the slabs. 2. A slab for building construction comprising a cementitious body, a top reinforcement molded in the upper edge of the slab and having recesses-therein and'said body having therein corresponding recesses for the reception of the ends of girders of a building, and a bottom reinforcement embedded in the lower edge of the slab and having projections adapted to interlock with the opposite sides of the top reinforcement of the sub-jacent slab.

3. A slab for building construction including aflatcementitious body, a beam embedded in the upper edge of the body and having an inwardly extending flange overlapping the outer face of'the slab and having an inwardly extending portion overlapping the inner face of the slab and with an inwardly projecting portion forming a ledge V retain the same on the ledge.

4. A' slab for building construction ine eluding a flat cementitious body, crossed reinforcements embedded in the body, beams embedded in the edges of the body, certain of said beams having openingstherein for the reception of said first reinforcements andsaid openings having reduced portions into which said reinforcements are adapted to'be wedged for holding the reinforcements in position, one of said beams having recesses therein forming seats for receiving and holding the ends of girders and the other beam having interlocking portions adapted-to'engage the reinforcing beam of an adjacent slab.

5. A slab for building construction including a fiat cementitious body and a C- shaped beam embedded in the upper edge of the body and provided with uniformly spaced apart recesses forming pockets in the beam for receiving the ends of girders, the lower lip of said beam forming the bottoms of the pockets and'providing an embedded ledge for supporting said girders.

6. A slab for building construction comprising a cementitious body, and a C-shaped beam embedded in the top of the body and having recesses in its intermediate portion extending from the lower lip of the beam through the top thereof and forming pockets to receive the ends of girders adapted to be supported upon said lower lip, said beam also having outstanding projections at opposite sides of the recesses adapted to be secured to the sides of the girders for hold ing the same in the pockets.

In testimony whereof, I have aflixed my signature in presence of two witnesses.

MILTON B. HERBRICK. 'VVitnesses ARTHUR H. STURGEs, HIRAM A. STUReEs. 

